Virginia's 20-Hour ABA Cap Is Dated July 1 and Conditioned on Federal Approval

Virginia's enacted 2026–2028 budget, Item 291, paragraph WW.2, tells the Department of Medical Assistance Services to do four things to the ABA benefit. The sentence most providers have read is the first one:

“The Department of Medical Assistance Services (DMAS) shall impose a 20 hour per week cumulative limit per recipient on services provided under ABA, effective July 1, 2026; such limit can be exceeded based upon documented medical necessity under early and periodic screening, diagnostic and treatment (EPSDT).”

The sentence worth reading twice is the last one in the paragraph: “The department shall implement this change upon federal approval and prior to the completion of any regulatory process undertaken in order to effect such change.”

Two dates, and they are not the same date

July 1 is the effective date the General Assembly wrote. Implementation is conditioned on CMS approving a state plan amendment under Titles XIX and XXI, and the budget gives no deadline for that and no fallback if approval is slow. So the operative question in Virginia right now isn't whether the cap exists — it does, in law, dated to a day that has passed — but whether the amendment authorizing it has cleared. A limit applied before federal approval and a limit applied after are different postures for an appeal.

DMAS has already answered the timing question. Its July 28, 2026 bulletin says “no changes will be made to the current authorization process until these changes are approved by CMS and updates to the DMAS Mental Health Services Manual have been finalized,” and that the effective date “will be announced in a subsequent notice.” Updated September 16: an earlier version of this article told readers to ask their MCO whether the limit was in use, without citing this bulletin.

The carve-outs, which are where the scope actually lives

• EPSDT overrides the cap. Twenty hours is a default, not a ceiling: documented medical necessity under EPSDT exceeds it, and EPSDT obliges Medicaid to cover medically necessary care for members under 21.
• Under-fives get a provisional diagnosis. The budget requires an ASD diagnosis before authorizing ABA — “however, children age 5 and younger may receive a provisional diagnosis for one-year utilizing a protocol designated by DMAS.” This clause is in the enacted text and was not in the version introduced in December. Without it, the diagnosis requirement would have stalled early intervention behind a full evaluation.
• School-based fee-for-service is out entirely. “The requirements in this amendment do not apply to behavior therapy provided by local education agency providers and reimbursed through the fee-for-service Medicaid school-based services program.”

What comes with the cap

The same paragraph directs DMAS to issue documentation guidance to ABA providers and facilities, and to coordinate with managed care organizations on periodic pre- and post-payment reviews of ABA payments. It requires reporting from each MCO that can be analyzed across MCOs, by region, by provider and statewide — provider-level comparison is the point of that sentence. DMAS is authorized to promulgate emergency regulations within 280 days or less of enactment.

Paragraph WW.3 adds an ABA benefit Utilization Workgroup, to examine expenditures and utilization and identify strategies to control cost while preserving access. Its remit runs to eight items including medical necessity criteria, provider qualification and supervision standards, utilization management tools aligned to national clinical practice guidelines, and the appropriateness of ABA for children with diagnoses other than ASD. Membership is specified: ABA providers including both center-based and home-based models, MCO representatives, Virginia licensed behavior analysts, and a child or adolescent psychiatrist. The meetings are open to the public and must offer opportunities for public input.

The limits

The budget sets no reporting deadline for the workgroup and names no date for its first meeting. It doesn't say what DMAS's provisional-diagnosis protocol will require, and that protocol is what determines whether the under-five carve-out is usable. The Virginia Association for Behavior Analysis pressed to strike both the cap and the diagnosis requirement during the session and did not succeed.

What you must know or do

• Owners and authorization staff: if an MCO reduces hours citing the 20-hour limit, ask for its authority in writing and cite DMAS's July 28 bulletin, which says the authorization process doesn't change until CMS approves and the Mental Health Services Manual is updated. Get that answer on paper before you appeal the reduction.
• Anyone with a member over 20 hours: your EPSDT medical-necessity documentation is now the whole case. Take your highest-hour members and check that each authorization has baseline data supporting the hours, not a restatement of the prior period's goals.
• Anyone serving children five and under: ask DMAS or your MCO which protocol designates a provisional diagnosis, and what evidence it takes. The carve-out is worth nothing until you know the answer, and it runs for one year per child.
• School-based providers: confirm whether your billing runs through the fee-for-service school-based services program. If it does, none of this applies to you — and that is worth establishing before an MCO applies the cap to you by mistake.
• Everyone: the Utilization Workgroup is public and takes public input, and its agenda includes supervision standards and medical necessity criteria. Watch for the meeting notice and send someone.